Tbactob



N. NELSON.

TRACTOR.

APPLICATION FILED NOV. l5 19H.

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Quoi/"m30 Patented May 27,1919.

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N. NELSON.

TRACTOR. v

APPLICATION FILED NGV. I5, I9II.

Patented May 27, 1919.4

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Application ledNoveniber 15, 1917. Seriallo. 202,19'4.

To all wIlL-om t may concern.'

Be it known that I, NICHOLAS NELSON, a citizen-of the United States, residing at State of Maine, have invented certain new and useful Improvementsin Tractors; and l do declare'the-following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains tofmake and use the saine.

My invention has for its principal object to provide a comparatively simple and inex-` pensive, yet a highlyicient and durable tractor whose frame is so constructed that it neednot be distorted by twisting as the wheels of the machine travel over rough fields and other uneven surfaces; and with this general object in view, 'the invention resides in the novel features of construction and unique combinations of parts to be hereinafter fully described and claimed, the descriptive matter being supplemented .by the accompanying drawings which form a part of this speciicationand in which Figure 1 is a side elevation; Fig. 2 is a top plan view; Fig. 3 is a central vertical longitudinal section;

Fig. 4 the plane ofthe line 4-4 of Fig. 3, and

Fig. 5 is an enlarged longitudinal section on the plane of the line 5 5 of Fig. 4. lnthedrawings above briefly described, the numerals 1 yand,2 designate res ectively thefrorit and real; axles of the` mac ine, th

- rear axle having a pair of driving wheels whereas dirigib e'wheels 4 'are provided at the ends ofthe front axlev 1, said wheels 4 being preferably mounted on Yspindles v5 which extend from the lower ends of vertical rock shafts 6, any suitable mechanism being 1 provided for so rocking said`\ shafts as t'o turn the wheels 4 in the ldirectionf inl whichl thefmachine isto be driven.

A suitably constructed mam frame "i extends forwardlyfrom the rear axle -2- andis f turned upwardly at 7 a and provided with a tubular spindle 8 extending across the front axle 1 and received in a suitable bearing 8 which is lsecuredto said axle. frame 9 is secured to the front axle 1 and overlies the frame 7 inspaced relation thereto; the sidebars of said auxiliary frame being arched at their' rear ends as indicated at 'Specification of Letters Patent.

Vrearwardly from the shafts 15 for drivinga is a vertical transverse section on An auxiliary 'Patenten May 27, 1919.

versaljoint or other swivel 11 j, with a trans-l i verse bar 12 of the frame 7.v Caribou, in the county of Aroostook and By the above described arrangement' of frames and swivel connection between them, the front and rear axles are permitted to tilt. independently as the machine passes over the ground, the spindle 8 and joint 11 then coming into play to permit relative movemenlr of the two frames 7 and -9 without distorting, them' in any manner. I

A gasolene engine 13 is mounted upon the front end of the auxiliary .frame 9 and a propeller shaft 14 is driven'by said engine, said shaft driving a pair of\transverse shafts l5, by means'of suitable differential gearin located in the housing* 16, said lhousing an the shafts 15 being mounted on frame 7 in advancelof the transverse bar 12 above described. v 75 The shafts 15 may be connectedl directly to the traction wheels, but the drive shown most clearly lin Fig. 2 is preferably employed. Chains 17 are shown extending sa pairof sleeves -18 mounted ona transverse shaft 19 in rear of the shafts`15,I and other f i chains 20 are driven by said sleeve for driving the traction wheels 3. f

A tractor constructed as or substantially as shown and described,`may' be usedfor numerous purposes, the application of a potato digger D being'illustrated in the drawings in dotted lines. fThis d' ge'r is shown located-below the-main frame?? and between 50 the traction wheels 3, but itJ will be obviousy that it could well be .positioned whereverkrequired. .Regardless of-its location', however,- suitabledriving means (not showin? Will'be employed for operating the maving parts of he' diggingand fconveying mechanism from theenginebr certain of the parts driven by ,j

The engine 13 is provided with the usual' starting crank and the Spindle 8 is sovlocated 100 as to permit it to receive the shaft 13'? ofif said crank as featuredin Fig. 5. The spindle 8 as well as the joint 11 are'alined with the propeller shaft-14 and the-differential i .gearing,' so that-4 relative movement of the 10Q two'framesrwill not in any manner interfere 1 with these parts. As the frames in question 1.

'move lin .r'espectj -to eachother, rollers or other suitable' d-evices 1L which are carriedl by frame 7 travel uponaxle 1 toat all times 110 l with the accompanying drawings, it will be` 2 l i y brace the latter against possible rearward tilting.l

From the foregoing, taken in connection obvious that although my invention is of extremely simple and inex ensive nature, it will be highly eiiicient an durable, particular emphasis being laid upon the provision of the main and auxiliary -frames and the relation of :the 'swivel connections between -them. -The relation of the differential.gearingwith. these connections is also of. great importance, since the Acontinuity 'of drive is y not aifected'by relative turning of the two frames, when such an arrangement is' emprobably the best results .are obtained lfrom the several specific features shown and described, these features constitute the preferred embodiment of the trac'- tor, but I wish it understood that within4 the scope of the invention as claimed, numerous minor changes may well be made. I claim: o

1. A tractor comprising a main horizontal main frame, a prime mover on said 'auxiliary frame, and driving connections between said prime 'mover and the rear wheels', said prime mover being mounted on the front end of said auxiliary frame'and the latter extending rearwardly from said prime mover a considerable distance, whereby the greater part of the prime mov'ers weight 1s supported by said front axle and only a small portion of said weight bythe swivel conneclocated centrally-behind said 'ack shaft, a 6

front-wheeled axle to which t e front end of saidauxiliary frame is secured, a central swivel connection between ysa-id u'pturned'` end of the main frame and said front axlea prime mover mounted on the front end of said auxiliary iframe, and a central drive shaft leading rearwardly from said prime mover for driving said jackshaft.

3. A tractor comprising a Amain frame wheel supported at its rear end and having a transverse arch at its front end, aV front wheeled axle swiveled centrally to the upper portion ofsaid'arch, a `pair of shoes ony said arch contacting with the rear side of saidA axle to brace the latter and at the same time to permit relative turning of said axle and arch, and an auxiliary engine-carrying frame secured to and extending rearwardly from Y said front axle5 the rear end of said auxiliary frame'being centrally swiveled to said main frame. Y

In testimony whereof .I have hereunto set my hand in the presence oftwo subscribing witnesses. A p NICHOLAS NELSON.

Witnesses:

J. L. JoHNso'N, v A. L..CARLsoN. 

